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Manipulating the phase transformation temperature to achieve cubic Cu5FeS4-xSex and enhanced thermoelectric performance

文献类型：期刊论文

作者Guo, Lijie2; Zhang, Bin1; Zhu, Huaxing2; Wu, Hong2; Yan, Yanci2; Gong, Xiangnan1; Lu, Xu2; Han, Guang3; Wang, Guoyu4,5; Zhou, Xiaoyuan1,2
刊名JOURNAL OF MATERIALS CHEMISTRY C
出版日期2020-12-28
卷号8期号:48页码:17222-17228
ISSN号2050-7526
DOI10.1039/d0tc04179c
通讯作者Han, Guang(guang.han@cqu.edu.cn) ; Wang, Guoyu(guoyuw@cigit.ac.cn) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn)
英文摘要Cu5FeS4, one of the promising Earth-abundant and low-toxicity Cu-based thermoelectric materials, transforms from an orthorhombic structure to a cubic phase when heated, which may impede its applications at elevated temperatures. Herein, we demonstrate that the phase transformation temperature of Cu5FeS4 can be suppressed to lower temperatures by replacing S by Se, as demonstrated in a series of Cu5FeS4-xSex (x = 0, 0.4, 0.8, 1.5, 2.0) compounds. Upon increasing the Se content x from 0 to 2.0, the phase transformation of Cu5FeS4-xSex takes place at progressively lower temperatures, with Cu5FeS2Se2 having a high cubic structure at room temperature. The Se-substituted Cu5FeS4 compounds achieve tremendously improved electrical performance, which is consistent with the calculated higher transport coefficient and weighted mobility. Combined with the still low lattice thermal conductivity, the Se-substituted Cu5FeS4 compounds achieve improved zT, for example, an improved peak zT of similar to 0.6 at 735 K in Cu5FeS3.6Se0.4, and an average zT of similar to 0.42 from 300 to 735 K in Cu5FeS2.5Se1.5 that is about 130% higher than that of Cu5FeS4. This study sheds light on enhancement of the thermoelectric performance of Cu5FeS4 based materials via manipulation of their phase transformation temperature.
资助项目National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[51672270] ; National Natural Science Foundation of China[51802034] ; National Natural Science Foundation of China[11604032] ; Fundamental Research Funds for the Central Universities[106112016CDJZR308808] ; Fundamental Research Funds for the Central Universities[2019CDQYCL003] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH016] ; Natural Science Foundation of Chongqing[cstc2019jcyjjqX0002]
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000601619300010
出版者ROYAL SOC CHEMISTRY
源URL[http://119.78.100.138/handle/2HOD01W0/12667]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Han, Guang; Wang, Guoyu; Zhou, Xiaoyuan
作者单位1.Chongqing Univ, Anal & Testing Ctr, Chongqing 401331, Peoples R China
2.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China
3.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
4.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Lijie,Zhang, Bin,Zhu, Huaxing,et al. Manipulating the phase transformation temperature to achieve cubic Cu5FeS4-xSex and enhanced thermoelectric performance[J]. JOURNAL OF MATERIALS CHEMISTRY C,2020,8(48):17222-17228.
APA Guo, Lijie.,Zhang, Bin.,Zhu, Huaxing.,Wu, Hong.,Yan, Yanci.,...&Zhou, Xiaoyuan.(2020).Manipulating the phase transformation temperature to achieve cubic Cu5FeS4-xSex and enhanced thermoelectric performance.JOURNAL OF MATERIALS CHEMISTRY C,8(48),17222-17228.
MLA Guo, Lijie,et al."Manipulating the phase transformation temperature to achieve cubic Cu5FeS4-xSex and enhanced thermoelectric performance".JOURNAL OF MATERIALS CHEMISTRY C 8.48(2020):17222-17228.

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来源：重庆绿色智能技术研究院

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